High efficiency laser action in mildly doped Yb:LuYAG ceramics

Year: 2017

Authors: Pirri A., Toci G., Li J., Xie T., Pan Y., Babin V., Beitlerova A., Nikl M., Vannini M.

Autors Affiliation: CNR, Ist Fis Applicata Nello Carrara, Via Madonna Piano 10, I-50019 Sesto Fiorentino, FI, Italy; CNR, Ist Nazl Ott, Via Madonna Piano 10, I-50019 Sesto Fiorentino, FI, Italy; Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Transparent & Optofunct Adv Inorgan Mat, 1295 Dingxi Rd, Shanghai 200050, Peoples R China; Acad Sci Czech Republ, Inst Phys, Cukrovarnicka 10, Prague 16253, Czech Republic.

Abstract: We report the first laser oscillations of 5 at%, 10 at% and 20 at% Yb3+ doped LuYAG ceramic samples and their spectroscopic characterization. The maximum output power, 8.7 W at 1029 nm, is achieved by 10 at% sample. A slope efficiency as high as 90.1% is obtained from the 10 at% doped sample. To our knowledge, these are the highest laser slope efficiencies obtained so far for Yb3+ doped LuYAG ceramics. With the 20 at% doped ceramic the maximum output power was 7.2 W at 1047.6 nm with a corresponding slope efficiency of 47.4%, whereas a decrease of the output power is observed for absorbed pump power higher than 15.6 W, probably due to the appearance of a non-linear loss mechanism. Finally, we explored the tunability of the ceramics finding the broadest continuous tuning range (from 992 nm to 1060 nm, i.e. 68 nm), with 5 at% and 10 at%, while it decreases to 54 nm with 20 at%.

Journal/Review: OPTICAL MATERIALS

Volume: 73      Pages from: 312  to: 318

More Information: This work was partially supported by CNR-AVCR Joint Project 2013–2015 “Influence of composition and defects on the properties of transparent ceramics and crystals for laser and scintillator applications”; by the National Natural Science Foundation of China (Grant No. 61575212 ); by the key research project of the frontier science of the Chinese Academy of Sciences (Grant No. QYZDB-SSW-JSC022 ) and by the project “ Chinese Academy of Sciences Visiting Professor for Senior International Scientists” (Grant No. 2013T2G0004 ).
KeyWords: Efficiency; Ytterbium, Absorbed pump power; Continuous tuning range; High-efficiency lasers; Laser ceramics; LuYAG; Maximum output power; Spectroscopic characterization; Yb laser, Ceramic materials
DOI: 10.1016/j.optmat.2017.08.031

Citations: 19
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